1.   Because the initial injections are unlikely to confer lifelong immunity, patients would have to be motivated enough to continue getting boosters, probably at least once a year.

2.   A specific gene mutation may also confer immunity to HIV by decreasing or eliminating the number of chemokine receptors in host cells.

3.   Doctors say that falling victim to one variety of dengue does not confer immunity to the others.

4.   Doctors have favored oral vaccine because it confers broader immunity.

5.   Getting chickenpox confers lifetime immunity.

6.   Now a new congressional committee investigating a different White House is contemplating whether to confer immunity on John Huang, the former top Democratic fund-raiser and government official.

7.   One problem is that the chickenpox vaccine is so new no one is sure how long it confers immunity.

8.   Recent research suggests that vaccines containing only DNA from HIV confer cellular immunity, although antibody responses are less reliable.

9.   Reduced dosages are considered likely to confer substantial immunity, but anthrax is so rare, that major questions about the vaccine are still unanswered.

10.   The Court is entirely right, however, to suggest that the Eleventh Amendment confers immunity over entities whose liabilities are funded by state taxpayer dollars.